Customer:
AC “Ukrtransgas” National Joint-Stock company (JSC) ”Naftogas of Ukraine”

Implementation:
Gas main compressor stations (CS) – CS “Talnoe”, CS “Bar”, CS “Gusyatin”, CS “Aleksandrovka”, CS “Gajsin” Gas Pipeline Division(GPD) “Cherkassytransgas” AC “Ukrtransgas” National Joint-Stock company (JSC) ”Naftogas of Ukraine”.

General information: Automated control system of compressor station (ACS CS) is designed to realize control of continuous gas transporting keeping specified parameters with minimal power expenditures. ACS provides control of process parameters and process equipment state, automatic execution of CS emergency start, operation and stop technological algorithms with process equipment protection

Process equipment includes gas compressor units (GCU), valves, fuel and start gas treatment units, gas heaters, pulse gas dewatering unit, gas for own needs treatment, gas cleaning system, boiler, emergency turbine generators, electrical equipment, heating and ventilating equipment.

Functions:
            - control of process parameters, operation modes, CS equipment state displayed at operator workstation;
            - history of process parameters and process equipment state;
            - remote control of valves and auxiliary equipment;
            - GCU remote emergency stop;
            - boilers remote emergency stop;
            - CS emergency stop with gas releasing;
            - CS emergency stop without gas releasing;
            - identification of CS equipment operation modes;
            - identification of GCU available operation modes;
            - display of CS surge considering point and surge reserve;
            - metering of technological gas, expenditures for gas heating, fuel and start gas flow;
            - calculation of electric equipment operating time;
            - discharge pressure keeping;
            - inlet gas pressure limitation;
            - injection gas temperature limitation;
            - CS operation ability;
            - data and control signals exchange with local systems;
            - gas cleaning facilities operation control;
            - automatic regulation of gas temperature at gas cooler outlet;
            - control of start and fuel gas treatment unit operation;
            - automatic maintenance of gas temperature behind gas heaters;
            - control of pulse gas drying unit;

• automatic control of fire tanks fill-up and pressure keeping in water system
• control of keeping specified proportion between water temperature at boiler outlet and ambient temperature
• keeping of constant specified temperature in GCU shelters, emergency generators room and battery room
• CS electric equipment remote control
• electricity consumption at CS and at every unit;
• reactive power compensation set control.

Technical solutions:

System is based on PLC GE Fanuc series RX3i and VersaMax. Ethernet is used as communication protocol and remote I/O network.
Configuration of PLC I/O and remote I/O modules provides:

1. input discrete signals - 591;
2. input analogue signals (4..20)mA- 147;
3. output discrete signals - 277;
4. output analogue signals (4..20)mA - 8.